Automatically-threading loom shuttle



Feb. 16 1926. 1,573,221

H. A. DAVIS AUTOMATICALLY THREADING LOOM SHUTTLE Filed Sept. 9 1925automatically threading Patented Feb. 16, W26.

warren stares enranr OFFICE.

HARRY DAVIS, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORA-TION, 0F I-IOPEDALE, MASSACHUSETTS, .A CORPORATION OF MAINE.

.AUTOMATICALLY-THREADING LOGM SHUTTLE.

Application fiIed September 9, 1825.

ing the filling or warp threads from being broken during weaving.

It is now the common practice to provide shuttles with threading blockswhich are secured to the shuttle at the end adjacent the side deliveryeye. The threading block, as now con1- monly formed, has a threaddirecting apron located usually above and in the region of theside'delivery eye, and from the apron projects the frontwardly andtransversely extending ithread direct-or, between which and the wood ofthe shuttle frontward of the side delivery eye is a passagewayt-o enablethe weft thread to pass under the thread director to the side deliveryeye during loom threading. That portion or the apron which is back ofthe side delivery eye, that is, nearer the bobbin chamber, is usuallyseated upon the wood of the shuttle and consequently a crack or openingis frequently observable between the apron and the wood of the shuttlein which either the Weft or Warp threads are liable to be caught duringweaving, with the result that breal age occurs.

1' One of the objects of the present invention is to provide a unionbetween the apron and the wood of the shuttle such that noobjectionalcrack or opening is presented to catch the threads and causebreakage.

The invention and novel features and new combination of parts will bestbe made clear from the following description and the ac- 'companyingdrawings of one good form thereof. a In'the drawings:

Fig. 1 is a plan view of the threading end of an automatically threadingshuttle containin the )resent invention' n b v I I 7 Fig. 2 1s a sideelevation of the same Serial No. 55,274.

shuttle with parts broken away adjacent the thread directing apron;

Fig. 3 lie with the threading block removed; and

Fig. 4: is a perspective view of the threading block detached.

in the present exploitation of the invention, the threading block isshown as of the general type of that described in the Stimpson Patent,No. lei-83,492, February 12, 1924-, wherein the longitudinally extendingthread passage is provided with a thread casting and guiding device forcasting the thread upwardly on the formation of a loop or overthrow, butinasmuch as threading blocks of usual construction are usually providedwith a thread directing apron overhanging the side delivery eye, itwillbe evident that the invention as hereinafter described is notrestrictive to the type of threading block disclosed in the Stimpsonpatent, but, on the contrary, may be used advantageously in connectionwith any usual form of threading block.

The shuttle body 1 is shown as formed of wood and is provided with theusual bobbin chamber 2 in which is detachably held the filling carrieror bobbin 3, as usual in filling replenishing shuttles, and the wood ofthe shuttle at one side is provided with a side delivery eye 4-, for thedelivery of thread during weaving.

Rearward ot the side delivery eye, the present invention contemplatesthat the wood of the shuttle be provided with a recess, forming outerand upper shoulders, in which the edge portions of the thread directingapron of the threading block may be seated;

Frontward ot the bobbin chamber the wood of the shuttle is cut away toform a thread block receiving chamber 5, as more clearly indicated inFig. 3, and seated with in this chamber is the threading block 6 havinga longitudinally extending thread pa- I In the present instance of theinvention, the threading block, as hereinbetore noted, oi the generaltype shown by the Stiinpson patent, and contains within thelongitiulinally extending thread passage the thread casting and guidingdevice 8, frontvard oi which is the bridge 9, over which the thread fromthe bobbin or filling carrier in the shuttle pas to the side deliveryeye during weaving. The threading block, howis a perspective view of theshutever, as to the features thus far described, may be of any usualconstruction, and, so far as the present invention is concerned, is notrestricted to the type disclosed in the Stimpson patent.

Rearward of the side delivery eye, the wood of the shuttle is inclineddownwardly from the top, as indicated at 10, such incline leadingtowards the side delivery eye, and the wood of the shuttle rearward ofthe side delivery eye is cut away to form a .recess 11, therebyproducing the outer shoulder 12 and the upper shoulder 13. This recessdoes not extend fully to the outer side surface of the shuttle, therebyleaving the wood of the shuttle at 14 in the shape and form asoriginally designed.

The threading block is provided with the thread directing apron 15, theforward and laterally extending end 16 of which forms a thread director.The edge portion 17 of the thread director is spaced from the wood ofthe shuttle to form a passageway 18 for the passage of the thread to theside delivery eye during loom threading.

The edge portion of the thread directing apron 15, as" more clearlyshown in Fig. 4c,

is 'rabbeted, therebyproducing a flange or projection 19 extending fromthe under and rear side of the thread directing apron and graduallymerging in depth into the downwardly extending flange 20 at the rearpart of the thread directing apron, Fig. 4. The depth of the rabbetformed in the thread directing apron is preferably somewhat greater thanthe depth of the shouldered portions of the recess formed in the shuttlewood, with the result that when the threading block is secured to theshuttle, as indicated in Figs. 1 and 2, the joint between the apron andthe wood of the shuttle will be covered, tethereby prevent the formationof a crack or joint .which might engage and break the weft thread duringWeaving. Should the thread find its way under the surface edge 21 of thethread directing apron, it will bear against the rabbeted or flangededge 19 which itself extends downwardly into the recess 11 formed in theshuttle wood, thereby presenting to the thread a smooth, jointlessbearing, over which it may freely travel during weaving.

The portion 20 of the thread directing apron rises in a gradual curve at22'into the top curve directing surface of the apron, and when thethreading block is secured in place, the flange portion 20 of the apronextends downwardly into the recess 11 behind the upper shoulder 13, withthe rounded surface 22 extending upwardly into the top surface of thethread directing apron.

During weaving it sometimes happens that the shuttle will engage thewarp threads, and if an edge joint were presented to the Warp threads atthe top portion of the thread directing apron, such warp threads areliable to be caught and broken. This condition is entirely obviated byprovidin the apron With the flange 20 which merges from the rabbetedouter edge of the apron, and sinking said flange into the wood of theshuttle in the recess 11 and behind the overlapping upper shoulder 13 ofthe shuttle wood.

Mounted in the side delivery eye of the shuttle wood is a guard 23 whichis shaped as shown, having its upwardly extending end portion 2% closingthe lower end of the recess 11 formed in the shuttle wood, and, asindicated in Fig. 2, the extreme portion of the end 24- exteuds into arecess formed in the thread directing apron, as at 25.

Vhen the parts are assembled and the threading block is secured to theshuttle, as, for instance, by the usual cross-bolt 26, the rabbeted edgeportion of the thread directing apron, as well as the top flangedportion 20 thereof, are seated in the recess 11 formed in the shuttlewood behind the outer and upper shoulders of the recess, with the resultthat during the weaving operation, should the weft thread be deflectedupwardly along the edge of the thread directing apron, it will engagethe outer rabbeted, edge portion 19 of the apron and find anunobstructed smooth surface over which it may readily pass withoutbreaking. Similarly, during weaving, should the shuttle encounter warpthreads during its passage through the, shed,

such warp threads will be directed by the wood of the shuttle and theinclined portion edge portion to fit within the shouldered area i of therecess to cover the joint.

2; An automatically threading shuttlefor looms,.having a side deliveryeye and pro vided with a recess in the wood of the shuttle leadingtowards the eye to form inclosing shoulders, and a threading blocksecured to the shuttle and having a thread directing apron provided witha rabbeted edge portion extending along the apron from the side deliveryeye to fit within the shouldered area of the recess to cover the joint.

3. An automatically threading shuttle for looms having the wood which isdirected towards the side delivery eye provided with a recess formed inthe wood. of the shuttle, and a threading block secured to the shuttleand having a thread directing apron provided with a rabbeted outwardedge fitting within the recess to cover the joint that the thread maynot be caught between the apron and shuttle wood during weaving.

4;- An automatically threading shuttle for looms having a recess formedin the shuttle wood forming an outer and upper shoulder rearward of theshuttle eye, and a threading block secured to the shuttle and having anapron provided with a rabbeted edge portion fitting inside the outershoulder of the recess to protect the joint and otter no ohstruction tothe movement of the thread.

5. An automatically threading shuttle for looms having a recess formedin the shuttle wood forming an outer and upper shoulder rearward of theshuttle eye, and a threading block secured to the shuttle and having anapron provided with an upper edge fitting within the upper shoulder 01'the recess and a rabbeted edge portion fitting inside the outer shoulderof the recess to protect the joint and ofi'er no obstruction to themovement of the thread.

6. An automatically threading shuttle for looms having the wood of theshuttle inclined towards the side delivery eye provided with a recess,and a threading block secured to the shuttle and provided with a threaddirecting apron extending from the side delivery eye the outer and upperedges of the apron being seated within the recess formed in the shuttlewood to avoid the formation of thread catching joints between the apronand shuttle wood.

7. i111 automatically threading shuttle for looms having the wood of theshuttle inclined towards the side delivery eye provided with a recess,and a threading block secured to the shuttle and provided with a threaddirecting apron extending from the side delivery eye, the outer andupper edges of the apron being seated within the recess formed in theshuttle wood to avoid the formation of thread catching joints betweenthe apron and shuttle wood, and a guard for the side delivery eyecovering the lower end of the recess.

In testimony whereof, I have signed my name to this specification.

HARRY A. DAVIS.

